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B C LABORATORIES <br /> LABORATORIES QUALITY CONTROL REPORT <br /> (Precision & Accuracy) <br /> Method 8140 <br /> FORWARD, INC. Date of Report: 04/01/98 <br /> P. 0. BOX 6336 Sample Matrix: stormwater <br /> STOCKTON, CA 95206 <br /> CARRIE FISHER <br /> Samples Affected: 98-01936-1 <br /> I I I MS MSD I I Precision) I I Accuracy 1 <br /> 1 I Sample ( MS I MSD I Spike I Spike I ISpike I Control I Ms I MSD I Control 1 <br /> Constituents IQC Sable ID I Result I Result I Result I Level I Level (Units IR.P.D.1 Limits 1% Rec 1% Rec I Limits 1 <br /> 1Bolstar IDI 02/24 J < 1. I 6.95 1 8.77 1 9.54 1 9.54 Igg/L 1 23. 1 71 73. 1 92. 1 51 - 1401 <br /> 1Coumaphos IDI 02/24 1 < 1. I 11.29 1 16.65 1 17.6 1 17.6 Iua/L 1 38. 1 71 64. 1 95. 1 9 - 1721 <br /> 1Disulfoton IDI 02/24 I < 1. I 8.83 1 9.65 1 10.36 1 10.36 Iua/L ( 9. 1 161 85. 1 93. 1 46 - 1101 <br /> 1Phorate IDI 02/24 1 < 1. i 16.76 I 17.26 ( 19.28 1 19.28 Iu9/L I 3. 1 71 87. 1 90. 1 39 - 1201 <br /> 1 st i rophos I I I I I I I I I I I I 1 <br /> 1 (Tetrachlorivinphos) IDI 02/24 1 < 1. 1 7.10 I 8.55 1 9.76 I 9.76 Iµg/L 1 18. 1 341 73. 1 88. 1 37 - 1291 <br /> p I I I I I I I 1 1 I I 1 A <br /> MS = Matrix Spike; MSD = Matrix Spike Duplicate; RPD = Relative Percent Difference <br /> Precision requirements for bolstar and coumaphos were not met. The <br /> sample report has been flagged accordingly. <br /> Quality C,Qntrol Officer <br /> Anthb'ny'gon&nno <br /> 4100 Atlas Ct. Bakersfield, CA 93309 (B05)827-481 1 FAX(805)327-1918 <br />